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The effect of 3-thiopheneacetic Acid in the polymerization of a conductive electrotextile for use in biosensor development.

McGraw SK, Alocilja E, Senecal A, Senecal K - Biosensors (Basel) (2013)

Bottom Line: The objectives of this study were to determine: (1) if the inclusion of 3TAA in the polymerization process would have an effect on the availability of binding sites in the high-surface area electrotextile for biorecognition elements and (2) how the increase in the concentration of 3TAA would affect the physical characteristics of the coating, resistivity of the sample and availability of binding sites.It was found that the addition of 3TAA to the polymerization process resulted in an increase in the size of the polypyrrole coating, as well as the material resistivity and available binding sites for biorecognition elements.A polymer coated membrane sample containing a concentration within the range of 10-50 mg/mL of 3TAA was selected as the best for future biosensor work.

View Article: PubMed Central - PubMed

Affiliation: Biosystems and Agricultural Engineering, Michigan State University, 524 S. Shaw Lane, 115 Farrall Hall, East Lansing, MI 48824, USA. shannon.k.mcgraw2.civ@mail.mil.

ABSTRACT
Investigations were conducted to develop an electrotextile using a nonwoven polypropylene fiber platform conformally coated in a conductive, functionalized copolymer of polypyrrole and 3-thiopheneacetic acid (3TAA). The objectives of this study were to determine: (1) if the inclusion of 3TAA in the polymerization process would have an effect on the availability of binding sites in the high-surface area electrotextile for biorecognition elements and (2) how the increase in the concentration of 3TAA would affect the physical characteristics of the coating, resistivity of the sample and availability of binding sites. It was found that the addition of 3TAA to the polymerization process resulted in an increase in the size of the polypyrrole coating, as well as the material resistivity and available binding sites for biorecognition elements. These factors were used to determine which of the tested concentrations was best for biosensor development. A polymer coated membrane sample containing a concentration within the range of 10-50 mg/mL of 3TAA was selected as the best for future biosensor work.

No MeSH data available.


Averaged FTIR spectra for polypyrrole coating with the addition of various concentrations of 3TAA: 0 mg/mL (1); 1 mg/mL (2); 10 mg/mL (3); 20 mg/mL (4); 50 mg/mL (5); 100 mg/mL (6).
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biosensors-03-00286-f004: Averaged FTIR spectra for polypyrrole coating with the addition of various concentrations of 3TAA: 0 mg/mL (1); 1 mg/mL (2); 10 mg/mL (3); 20 mg/mL (4); 50 mg/mL (5); 100 mg/mL (6).

Mentions: Because EDS is morphology-dependent, it is not generally considered a quantitative technique. In order to support our findings about the increased presence of carboxyl groups in the polymer, due to the increase of 3TAA concentration in the monomer, FTIR spectra for each of the tested sample concentrations were generated. Because of variability in the thickness of the coatings, different absorption rates were observed. As the concentration of 3TAA increases, the C–S–C peak (~ 670 cm–1) showing planar deformation of the thiophene ring becomes more pronounced. A peak is also observed at a wavelength of 750 cm–1, possibly corresponding to the C–H group being out of plane mode in the thiophene ring. An increase in the C–C stretching of the thiophene ring (~1,370 cm–1) is also observed as the concentration of 3TAA increases. Peaks not found in pure pyrrole are also observed at wavelengths of 1,500 cm–1, between 1,550 and 1,700 cm–1 and at 2,900 cm–1 and appear to increase at increasing concentrations of 3TAA. The increases observed between 1,550 and 1,700 cm–1 are particularly notable, because they are most likely due to the C=O stretching for the acetic acid in the 3TAA. These peaks are first seen at a concentration of 10 mg/mL, but become pronounced at 50 mg/mL. This data indicates that the 3TAA is copolymerizing with the pyrrole during the aqueous deposition polymerization onto the polypropylene microfibers. These results can be seen in Figure 4.


The effect of 3-thiopheneacetic Acid in the polymerization of a conductive electrotextile for use in biosensor development.

McGraw SK, Alocilja E, Senecal A, Senecal K - Biosensors (Basel) (2013)

Averaged FTIR spectra for polypyrrole coating with the addition of various concentrations of 3TAA: 0 mg/mL (1); 1 mg/mL (2); 10 mg/mL (3); 20 mg/mL (4); 50 mg/mL (5); 100 mg/mL (6).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4263581&req=5

biosensors-03-00286-f004: Averaged FTIR spectra for polypyrrole coating with the addition of various concentrations of 3TAA: 0 mg/mL (1); 1 mg/mL (2); 10 mg/mL (3); 20 mg/mL (4); 50 mg/mL (5); 100 mg/mL (6).
Mentions: Because EDS is morphology-dependent, it is not generally considered a quantitative technique. In order to support our findings about the increased presence of carboxyl groups in the polymer, due to the increase of 3TAA concentration in the monomer, FTIR spectra for each of the tested sample concentrations were generated. Because of variability in the thickness of the coatings, different absorption rates were observed. As the concentration of 3TAA increases, the C–S–C peak (~ 670 cm–1) showing planar deformation of the thiophene ring becomes more pronounced. A peak is also observed at a wavelength of 750 cm–1, possibly corresponding to the C–H group being out of plane mode in the thiophene ring. An increase in the C–C stretching of the thiophene ring (~1,370 cm–1) is also observed as the concentration of 3TAA increases. Peaks not found in pure pyrrole are also observed at wavelengths of 1,500 cm–1, between 1,550 and 1,700 cm–1 and at 2,900 cm–1 and appear to increase at increasing concentrations of 3TAA. The increases observed between 1,550 and 1,700 cm–1 are particularly notable, because they are most likely due to the C=O stretching for the acetic acid in the 3TAA. These peaks are first seen at a concentration of 10 mg/mL, but become pronounced at 50 mg/mL. This data indicates that the 3TAA is copolymerizing with the pyrrole during the aqueous deposition polymerization onto the polypropylene microfibers. These results can be seen in Figure 4.

Bottom Line: The objectives of this study were to determine: (1) if the inclusion of 3TAA in the polymerization process would have an effect on the availability of binding sites in the high-surface area electrotextile for biorecognition elements and (2) how the increase in the concentration of 3TAA would affect the physical characteristics of the coating, resistivity of the sample and availability of binding sites.It was found that the addition of 3TAA to the polymerization process resulted in an increase in the size of the polypyrrole coating, as well as the material resistivity and available binding sites for biorecognition elements.A polymer coated membrane sample containing a concentration within the range of 10-50 mg/mL of 3TAA was selected as the best for future biosensor work.

View Article: PubMed Central - PubMed

Affiliation: Biosystems and Agricultural Engineering, Michigan State University, 524 S. Shaw Lane, 115 Farrall Hall, East Lansing, MI 48824, USA. shannon.k.mcgraw2.civ@mail.mil.

ABSTRACT
Investigations were conducted to develop an electrotextile using a nonwoven polypropylene fiber platform conformally coated in a conductive, functionalized copolymer of polypyrrole and 3-thiopheneacetic acid (3TAA). The objectives of this study were to determine: (1) if the inclusion of 3TAA in the polymerization process would have an effect on the availability of binding sites in the high-surface area electrotextile for biorecognition elements and (2) how the increase in the concentration of 3TAA would affect the physical characteristics of the coating, resistivity of the sample and availability of binding sites. It was found that the addition of 3TAA to the polymerization process resulted in an increase in the size of the polypyrrole coating, as well as the material resistivity and available binding sites for biorecognition elements. These factors were used to determine which of the tested concentrations was best for biosensor development. A polymer coated membrane sample containing a concentration within the range of 10-50 mg/mL of 3TAA was selected as the best for future biosensor work.

No MeSH data available.